add badges

Author: alexcheng1982

README.md

@@ -1,4 +1,8 @@
-# Spring AI ChatModel
+# Spring AI ChatModel using Official Java SDK
+
+[![build](https://github.com/JavaAIDev/openai-chatmodel-standalone/actions/workflows/build.yaml/badge.svg)](https://github.com/JavaAIDev/openai-chatmodel-standalone/actions/workflows/build.yaml)
+![Maven Central Version](https://img.shields.io/maven-central/v/com.javaaidev/openai-chatmodel-standalone)
+
 
 Spring AI `ChatModel` implementation for OpenAI using
 the [official SDK](https://github.com/openai/openai-java).
@@ -42,4 +46,4 @@ val chatClient =
     ChatClient.builder(chatModel).defaultOptions(chatOptions).build()
 val response = chatClient.prompt().user("tell me a joke")
     .call().content()
-```
+```